If we take two recent swing lows and swing highs and draw Fibonacci Retracement levels for getting a clear idea of possible retracements then there are following possibilities. 1. Nifty has two retracement levels in close proximities, which coincides with each other. 2. First Retracement level of 18030-18080 is already completed. If Nifty Sustains, will move up. 3. If Nifty breaks this level of Retracement, then it might lead to next retracement level of 17480-17576.(buy Put or sell Future)